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hv: fix cpuid 0x2 mismatch when launch RTVM use atom core

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When CPUID executes with EAX set to 02H, the processor returns information about cache and TLB information.
This information is percpu related, and should be obtained directly from the physical cpu.

BTW, this patch is backported from v2.7 branch.

Tracked-On: #6931
Signed-off-by: Tw <wei.tan@intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
This commit is contained in:
Tw 2021-11-25 09:50:40 +08:00 committed by acrnsi-robot
parent 6458a3f474
commit deb35a0de9
1 changed files with 10 additions and 11 deletions
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21
hypervisor/arch/x86/guest/vcpuid.c
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@ -490,6 +490,11 @@ static int32_t set_vcpuid_extended_function(struct acrn_vm *vm)
return result; return result;
} }
static inline bool is_percpu_related(uint32_t leaf)
{
return ((leaf == 0x1U) || (leaf == 0xbU) || (leaf == 0xdU) || (leaf == 0x19U) || (leaf == 0x80000001U) || (leaf == 0x2U));
}
int32_t set_vcpuid_entries(struct acrn_vm *vm) int32_t set_vcpuid_entries(struct acrn_vm *vm)
{ {
int32_t result; int32_t result;
@ -509,8 +514,7 @@ int32_t set_vcpuid_entries(struct acrn_vm *vm)
vm->vcpuid_level = limit; vm->vcpuid_level = limit;
for (i = 1U; i <= limit; i++) { for (i = 1U; i <= limit; i++) {
/* cpuid 1/0xb is percpu related */ if (is_percpu_related(i)) {
if ((i == 1U) || (i == 0xbU) || (i == 0xdU) || (i == 0x19U)) {
continue; continue;
} }
@ -604,11 +608,6 @@ int32_t set_vcpuid_entries(struct acrn_vm *vm)
return result; return result;
} }
static inline bool is_percpu_related(uint32_t leaf)
{
return ((leaf == 0x1U) || (leaf == 0xbU) || (leaf == 0xdU) || (leaf == 0x19U) || (leaf == 0x80000001U));
}
static void guest_cpuid_01h(struct acrn_vcpu *vcpu, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx) static void guest_cpuid_01h(struct acrn_vcpu *vcpu, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
{ {
uint32_t apicid = vlapic_get_apicid(vcpu_vlapic(vcpu)); uint32_t apicid = vlapic_get_apicid(vcpu_vlapic(vcpu));
@ -850,11 +849,11 @@ void guest_cpuid(struct acrn_vcpu *vcpu, uint32_t *eax, uint32_t *ebx, uint32_t
default: default:
/* /*
* In this switch statement, leaf shall either be 0x01U or 0x0bU * In this switch statement, leaf 0x01/0x0b/0x0d/0x19/0x80000001
* or 0x0dU or 0x80000001U. All the other cases have been handled properly * shall be handled specifically. All the other cases
* before this switch statement. * just return physical value.
* Gracefully return if prior case clauses have not been met.
*/ */
cpuid_subleaf(leaf, *ecx, eax, ebx, ecx, edx);
break; break;
} }
} }